/// <summary>
/// Begins listening for client connections in a separate background thread.
/// This method waits when pipe will be created(or throws exception).
/// </summary>
/// <exception cref="InvalidOperationException"></exception>
/// <exception cref="IOException"></exception>
public async Task StartAsync(CancellationToken cancellationToken = default)
{
if (IsStarted)
{
throw new InvalidOperationException("Server already started");
}
await StopAsync(cancellationToken);
var source = new TaskCompletionSource <bool>();
using var registration = cancellationToken.Register(() => source.TrySetCanceled(cancellationToken));
ListenWorker = new TaskWorker(async token =>
{
while (!token.IsCancellationRequested)
{
try
{
var connectionPipeName = $"{PipeName}_{++NextPipeId}";
// Send the client the name of the data pipe to use
try
{
#if NETSTANDARD2_0
using var serverStream = CreatePipeStreamFunc?.Invoke(PipeName) ?? PipeServerFactory.Create(PipeName);
#else
await using var serverStream = CreatePipeStreamFunc?.Invoke(PipeName) ?? PipeServerFactory.Create(PipeName);
#endif
PipeStreamInitializeAction?.Invoke(serverStream);
source.TrySetResult(true);
await serverStream.WaitForConnectionAsync(token).ConfigureAwait(false);
await using var handshakeWrapper = new PipeStreamWrapper(serverStream);
await handshakeWrapper.WriteAsync(Encoding.UTF8.GetBytes(connectionPipeName), token)
.ConfigureAwait(false);
}
catch (Exception exception)
{
if (WaitFreePipe)
{
throw;
}
source.TrySetException(exception);
break;
}
// Wait for the client to connect to the data pipe
var connectionStream = CreatePipeStreamFunc?.Invoke(connectionPipeName) ?? PipeServerFactory.Create(connectionPipeName);
PipeStreamInitializeAction?.Invoke(connectionStream);
try
{
await connectionStream.WaitForConnectionAsync(token).ConfigureAwait(false);
}
catch
{
#if NETSTANDARD2_0
connectionStream.Dispose();
#else
await connectionStream.DisposeAsync().ConfigureAwait(false);
#endif
throw;
}
// Add the client's connection to the list of connections
var connection = ConnectionFactory.Create <T>(connectionStream, Formatter);
connection.MessageReceived += (sender, args) => OnMessageReceived(args);
connection.Disconnected += (sender, args) => OnClientDisconnected(args);
connection.ExceptionOccurred += (sender, args) => OnExceptionOccurred(args.Exception);
connection.Start();
Connections.Add(connection);
OnClientConnected(new ConnectionEventArgs <T>(connection));
}
catch (OperationCanceledException)
{
throw;
}
// Catch the IOException that is raised if the pipe is broken or disconnected.
catch (IOException)
{
await Task.Delay(TimeSpan.FromMilliseconds(1), token).ConfigureAwait(false);
}
catch (Exception exception)
{
OnExceptionOccurred(exception);
break;
}
}
}, OnExceptionOccurred);
try
{
await source.Task.ConfigureAwait(false);
}
catch (Exception)
{
await StopAsync(cancellationToken);
throw;
}
}
/// <summary>
/// Begins listening for client connections in a separate background thread.
/// This method waits when pipe will be created(or throws exception).
/// </summary>
/// <exception cref="InvalidOperationException"></exception>
/// <exception cref="IOException"></exception>
public async Task StartAsync(CancellationToken cancellationToken = default)
{
if (IsStarted)
{
throw new InvalidOperationException("Server already started");
}
await StopAsync(cancellationToken);
var source = new TaskCompletionSource <bool>();
using var registration = cancellationToken.Register(() => source.TrySetCanceled(cancellationToken));
ListenWorker = new TaskWorker(async token =>
{
while (!token.IsCancellationRequested)
{
try
{
if (Connection != null && Connection.IsConnected)
{
await Task.Delay(TimeSpan.FromMilliseconds(1), cancellationToken).ConfigureAwait(false);
continue;
}
if (Connection != null)
{
await Connection.DisposeAsync().ConfigureAwait(false);
}
// Wait for the client to connect to the data pipe
var connectionStream = CreatePipeStreamFunc?.Invoke(PipeName) ?? PipeServerFactory.Create(PipeName);
try
{
PipeStreamInitializeAction?.Invoke(connectionStream);
source.TrySetResult(true);
await connectionStream.WaitForConnectionAsync(token).ConfigureAwait(false);
}
catch
{
#if NETSTANDARD2_0
connectionStream.Dispose();
#else
await connectionStream.DisposeAsync().ConfigureAwait(false);
#endif
throw;
}
var connection = ConnectionFactory.Create <T>(connectionStream, Formatter);
try
{
connection.MessageReceived += (sender, args) => OnMessageReceived(args);
connection.Disconnected += (sender, args) => OnClientDisconnected(args);
connection.ExceptionOccurred += (sender, args) => OnExceptionOccurred(args.Exception);
connection.Start();
}
catch
{
await connection.DisposeAsync().ConfigureAwait(false);
throw;
}
Connection = connection;
OnClientConnected(new ConnectionEventArgs <T>(connection));
}
catch (OperationCanceledException)
{
if (Connection != null)
{
await Connection.DisposeAsync().ConfigureAwait(false);
Connection = null;
}
throw;
}
// Catch the IOException that is raised if the pipe is broken or disconnected.
catch (IOException exception)
{
if (!WaitFreePipe)
{
source.TrySetException(exception);
break;
}
await Task.Delay(TimeSpan.FromMilliseconds(1), token).ConfigureAwait(false);
}
catch (Exception exception)
{
OnExceptionOccurred(exception);
break;
}
}
}, OnExceptionOccurred);
try
{
await source.Task.ConfigureAwait(false);
}
catch (Exception)
{
await StopAsync(cancellationToken);
throw;
}
}